3. Other websites on aviation regulations

AviationLaw.EU aims to provide a free, in-depth source of reference to all those with an interest in aviation law. Such persons may include practitioners in the field, researchers, students and also passengers or other users of aviation transport.
www.aviationlaw.eu/

4. Other websites on ionizing radiation

The International Commission on Radiological Protection (ICRP) helps to prevent cancer and other diseases and effects associated with exposure to ionising radiation, and to protect the environment. www.icrp.org/